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Ti-Ni based shape memory alloy vacuum electron beam connecting technology

A technology of vacuum electron beam and memory alloy, which is applied in the direction of electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of no patent application, etc., and achieve strong penetration ability, good connection, and high energy conversion rate. Effect

Inactive Publication Date: 2013-10-23
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this stage, there are few reports on the research on the Ti-Ni-based shape memory alloy electron beam welding system, and no relevant patent applications have been seen.

Method used

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  • Ti-Ni based shape memory alloy vacuum electron beam connecting technology
  • Ti-Ni based shape memory alloy vacuum electron beam connecting technology
  • Ti-Ni based shape memory alloy vacuum electron beam connecting technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The material is a Ti-Ni shape memory alloy plate, wherein the size is 100×55×4mm; the alloy composition is Ti: 49.2at%, Ni: 50.8at%.

[0030] Firstly, the Ti-Ni shape memory alloy with nearly equiatomic ratio is smelted. After 1073K hot rolling into 4mm thick plate, solution treatment at 860℃ for 40min. Then, carry out surface treatment on the Ti-Ni base shape memory alloy plate to be welded, and then use acetone and alcohol solvent to ultrasonically clean it to remove oil stains, and dry it; secondly, measure the size of the cleaned workpiece and place it in a vacuum chamber. The fixture is fixed, the program is set, and the position of the plate is adjusted so that the electron beam can accurately hit the place to be welded, and then vacuum, the vacuum degree is 10 -2 ~10 -3 Pa; again, the electron beam is focused to ensure that the weld is well formed, and the program is started, and the electron beam starts welding from one end of the plate until the other end. W...

Embodiment 2

[0035] Material Ti-Ni-Nb wide hysteresis shape memory alloy, the specification is 90×60×3.5mm, the alloy composition is Ti: 44at%, Ni: 47at%, Nb: 9at%.

[0036] Firstly, the forged ingot is heat-preserved at 1073K, and then hot-rolled into a 4mm thick plate by a transverse universal rolling mill, and then solution treated at 860°C for 40 minutes to obtain the plate for welding. Then, the Ti-Ni-based shape memory alloy plate to be welded is subjected to mechanical processing surface treatment, and then ultrasonically cleaned with acetone and alcohol solvents to remove oil stains and dried; secondly, the cleaned workpieces are butted and placed in a vacuum chamber. Fix the two plates with clamps, and then vacuum, the vacuum degree is 10 -2 ~10 -3 Pa; again, focus the electron beam to the butt joint gap of the two plates, and start welding from one end of the gap until the other end. Welding parameters are as follows: welding speed is 1000mm / min, accelerating voltage is 60KV, f...

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Abstract

The invention provides a Ti-Ni based shape memory alloy vacuum electron beam connecting technology. Concretely, vacuum electron beams are used for achieving connection of Ti-Ni-X alloy, wherein X can be Nb, Mo, Cu, Hf and the like. An existing connecting mode of Ti-Ni based shape memory alloy has the problems of being low in weld strength, thick and big in grain structure, prone to generating cracks and the like. The electron beams which are strong in penetrating power, high in energy transformation ratio and good in controllability are adopted as a welding hot source, therefore, time of the whole connecting process is shortened, a heat affected zone is reduced, weld defects are reduced, moreover, narrow weld seams can be obtained (the width is smaller than 1mm), mechanical performance and the memory effect of welded material are ensured to the maximum extent, after parameter optimization, the strength of a electron beam welding connector can reach over 75% that of parent material, and the memory effect can reach over 85% that of the parent material.

Description

technical field [0001] The invention belongs to the fields of electronic materials, functional materials and intelligent materials, and in particular relates to a vacuum electron beam connection technology of a Ti-Ni-based shape memory alloy. Background technique [0002] Ti-Ni-based shape memory alloy has excellent shape memory effect and superelasticity, high specific strength, corrosion resistance, wear resistance and biocompatibility, and has broad application background in aerospace, atomic energy, marine development and other fields. The current practical Ti-Ni-based shape memory alloy devices are mainly manufactured into simple industrial parts (such as springs, wires and sheets, etc.), and welding Ti-Ni-based shape memory alloys into more complex shapes is to expand its application. An important way of scope. Therefore, it is particularly important and urgent to develop Ti-Ni-based shape memory alloy connection technology, improve the welding performance of shape me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/06
Inventor 姜海昌杨丹赵明久戎利建闫德胜胡小峰宋元元
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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